:root{
    --navy-900:#050c1f;
    --navy-850:#07122c;
    --navy-800:#0A1A3F;
    --navy-700:#102a5c;
    --accent:#00E0FF;
    --ink:#EAF1FF;
    --muted:#8FA0C6;
    --muted-2:#5d6f99;
    --line:rgba(120,160,255,.13);
    --card:rgba(255,255,255,.028);
    --font-kr:'Noto Sans KR', system-ui, sans-serif;
    --font-en:'Space Grotesk', 'Noto Sans KR', system-ui, sans-serif;
    --maxw:1180px;
  }

  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{
    font-family:var(--font-kr);
    background:var(--navy-900);
    color:var(--ink);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
    overflow-x:hidden;
    line-height:1.6;
  }
  ::selection{background:var(--accent);color:var(--navy-900);}

  .en{font-family:var(--font-en);}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px;width:100%;}
  a{color:inherit;text-decoration:none;}

  
  .eyebrow{
    font-family:var(--font-en);
    font-size:12.5px;font-weight:600;letter-spacing:.28em;
    text-transform:uppercase;color:var(--accent);
    display:inline-flex;align-items:center;gap:12px;
  }
  .eyebrow::before{
    content:"";width:28px;height:1px;background:var(--accent);
    opacity:.6;display:inline-block;
  }

  
  header.nav{
    position:fixed;top:0;left:0;right:0;z-index:100;
    transition:background .35s ease, border-color .35s ease, backdrop-filter .35s;
    border-bottom:1px solid transparent;
  }
  header.nav.scrolled{
    background:rgba(6,14,34,.72);
    -webkit-backdrop-filter:blur(18px) saturate(160%);
    backdrop-filter:blur(18px) saturate(160%);
    border-bottom:1px solid var(--line);
  }
  .nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;}
  .brand{display:flex;align-items:center;gap:10px;font-family:var(--font-en);
    font-weight:700;font-size:19px;letter-spacing:-.01em;}
  .brand .brand-logo{width:38px;height:38px;flex:none;}
  .brand b{font-weight:700;}
  .brand .on{color:var(--accent);}
  .nav-links{display:flex;align-items:center;gap:34px;}
  .nav-links a{font-size:14px;color:var(--muted);font-weight:500;transition:color .2s;
    position:relative;}
  .nav-links a:hover{color:var(--ink);}
  .nav-cta{
    font-family:var(--font-kr);font-size:13.5px;font-weight:700;
    color:var(--navy-900);background:var(--accent);
    padding:10px 20px;border-radius:999px;transition:transform .2s, box-shadow .2s;
    box-shadow:0 0 0 0 rgba(0,224,255,0);
  }
  .nav-cta:hover{transform:translateY(-1px);box-shadow:0 8px 26px -8px var(--accent);}
  .nav-burger{display:none;background:none;border:0;color:var(--ink);cursor:pointer;}

  
  .hero{
    position:relative;min-height:100svh;width:100%;
    display:flex;align-items:center;
    overflow:hidden;isolation:isolate;
    background:
      radial-gradient(120% 90% at 78% 12%, rgba(0,224,255,.10), transparent 55%),
      radial-gradient(120% 110% at 12% 92%, rgba(16,42,92,.55), transparent 60%),
      linear-gradient(180deg, var(--navy-850) 0%, var(--navy-900) 100%);
  }
  .hero-layers{position:absolute;inset:0;z-index:0;pointer-events:none;}
  .layer{position:absolute;will-change:transform;}

  
  .layer.l-bg{left:0;top:-8%;width:100%;height:108%;z-index:1;overflow:hidden;}
  .hero-vid{
    position:absolute;inset:0;width:100%;height:100%;
    object-fit:cover;object-position:center 38%;
    display:block;
  }

  .hero-grad-mask{
    position:absolute;inset:0;z-index:5;pointer-events:none;
    background:
      linear-gradient(90deg, rgba(4,10,26,.86) 0%, rgba(4,10,26,.5) 34%, transparent 64%),
      linear-gradient(180deg, rgba(4,10,26,.34) 0%, transparent 22%, transparent 56%, rgba(4,10,26,.9) 100%);
  }

  .hero-content{position:relative;z-index:6;width:100%;will-change:transform,opacity;}
  .hero-eyebrow{margin-bottom:26px;}
  .hero h1{
    font-family:var(--font-kr);font-weight:900;
    font-size:clamp(40px,7.6vw,98px);
    line-height:1.02;letter-spacing:-.025em;
    margin-bottom:30px;text-wrap:balance;
  }
  .hero h1 .line2{color:var(--accent);
    text-shadow:0 0 50px rgba(0,224,255,.35);}
  .hero h1 .en-sub{
    display:block;font-family:var(--font-en);font-weight:500;
    font-size:clamp(13px,1.5vw,20px);letter-spacing:.02em;
    color:var(--muted);margin-top:20px;line-height:1.3;
  }
  .hero p.lead{
    max-width:620px;font-size:clamp(15px,1.5vw,18.5px);
    color:var(--muted);line-height:1.75;margin-bottom:40px;
    text-wrap:pretty;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;}
  .btn{
    font-family:var(--font-kr);font-weight:700;font-size:15px;
    padding:15px 28px;border-radius:999px;cursor:pointer;border:0;
    transition:transform .2s, box-shadow .2s, background .2s, border-color .2s;
    display:inline-flex;align-items:center;gap:10px;
  }
  .btn-primary{background:var(--accent);color:var(--navy-900);
    box-shadow:0 10px 40px -14px var(--accent);}
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 50px -12px var(--accent);}
  .btn-primary .arr{transition:transform .25s;}
  .btn-primary:hover .arr{transform:translateX(4px);}
  .btn-ghost{background:transparent;color:var(--ink);
    border:1px solid var(--line);}
  .btn-ghost:hover{border-color:var(--accent);color:var(--accent);}

  .scroll-cue{
    position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
    z-index:6;display:flex;flex-direction:column;align-items:center;gap:10px;
    font-family:var(--font-en);font-size:10.5px;letter-spacing:.32em;
    color:var(--muted-2);text-transform:uppercase;
  }
  .scroll-cue .track{width:1px;height:46px;background:linear-gradient(var(--accent),transparent);
    position:relative;overflow:hidden;}
  .scroll-cue .track::after{content:"";position:absolute;top:-50%;left:0;width:1px;height:50%;
    background:var(--accent);animation:cue 1.9s cubic-bezier(.7,0,.3,1) infinite;}
  @keyframes cue{0%{top:-50%}60%,100%{top:100%}}

  
  section.block{position:relative;padding:clamp(90px,12vw,168px) 0;}
  .sec-head{max-width:760px;margin-bottom:64px;}
  .sec-head h2{
    font-family:var(--font-kr);font-weight:900;
    font-size:clamp(28px,4vw,52px);letter-spacing:-.02em;line-height:1.12;
    margin-top:22px;text-wrap:balance;
  }
  .sec-head h2 .accent{color:var(--accent);}

  
  .block.bordered{border-top:1px solid var(--line);}

  
  #services{background:
    radial-gradient(90% 60% at 85% 0%, rgba(0,224,255,.05), transparent 60%),
    var(--navy-900);}
  .svc-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;}
  .svc-card{
    position:relative;border:1px solid var(--line);border-radius:20px;
    padding:44px 40px 40px;background:var(--card);overflow:hidden;
    transition:transform .35s cubic-bezier(.2,.7,.2,1), border-color .35s, background .35s;
  }
  .svc-card::before{
    content:"";position:absolute;inset:0;opacity:0;transition:opacity .4s;
    background:radial-gradient(120% 80% at 100% 0%, rgba(0,224,255,.10), transparent 55%);
    pointer-events:none;
  }
  .svc-card:hover{transform:translateY(-6px);border-color:rgba(0,224,255,.4);
    background:rgba(255,255,255,.045);}
  .svc-card:hover::before{opacity:1;}
  .svc-num{font-family:var(--font-en);font-size:13px;font-weight:600;
    letter-spacing:.2em;color:var(--muted-2);}
  .svc-icon{margin:22px 0 26px;width:56px;height:56px;border-radius:14px;
    display:flex;align-items:center;justify-content:center;
    background:rgba(0,224,255,.08);border:1px solid rgba(0,224,255,.22);color:var(--accent);}
  .svc-card h3{font-family:var(--font-kr);font-weight:900;
    font-size:clamp(21px,2.4vw,28px);letter-spacing:-.01em;line-height:1.25;margin-bottom:8px;}
  .svc-card .h-en{font-family:var(--font-en);font-size:13px;font-weight:500;
    letter-spacing:.04em;color:var(--accent);margin-bottom:18px;}
  .svc-card p{color:var(--muted);font-size:15px;line-height:1.78;margin-bottom:26px;
    text-wrap:pretty;}
  .svc-tags{display:flex;flex-wrap:wrap;gap:9px;}
  .svc-tags span{font-size:12.5px;color:var(--muted);padding:6px 13px;border-radius:999px;
    border:1px solid var(--line);background:rgba(255,255,255,.02);
    font-family:var(--font-en);letter-spacing:.01em;}

  
  #about{background:var(--navy-850);}
  .about-grid{display:grid;grid-template-columns:0.85fr 1.15fr;gap:64px;align-items:start;}
  .about-grid .lead-q{font-family:var(--font-kr);font-weight:900;
    font-size:clamp(24px,2.9vw,38px);line-height:1.3;letter-spacing:-.02em;text-wrap:balance;}
  .about-grid .lead-q .accent{color:var(--accent);}
  .about-body p{color:var(--muted);font-size:16px;line-height:1.85;margin-bottom:22px;
    max-width:560px;text-wrap:pretty;}
  .principles{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:42px;}
  .principle{border-top:1px solid var(--line);padding-top:18px;}
  .principle .pn{font-family:var(--font-en);font-size:12px;color:var(--accent);
    letter-spacing:.18em;font-weight:600;}
  .principle h4{font-family:var(--font-kr);font-weight:700;font-size:16px;margin:12px 0 7px;}
  .principle p{font-size:13.5px;color:var(--muted);line-height:1.6;margin:0;}

  
  #contact{position:relative;overflow:hidden;
    background:radial-gradient(110% 130% at 50% -10%, rgba(0,224,255,.12), transparent 55%), var(--navy-900);}
  .contact-card{
    position:relative;text-align:center;max-width:820px;margin:0 auto;
  }
  .contact-card h2{font-family:var(--font-kr);font-weight:900;
    font-size:clamp(32px,5.4vw,68px);letter-spacing:-.025em;line-height:1.06;margin-bottom:8px;}
  .contact-card .en-big{font-family:var(--font-en);font-weight:500;color:var(--accent);
    font-size:clamp(14px,1.8vw,22px);letter-spacing:.02em;margin-bottom:26px;}
  .contact-card p{color:var(--muted);font-size:17px;line-height:1.7;margin-bottom:40px;
    max-width:540px;margin-left:auto;margin-right:auto;text-wrap:pretty;}
  .contact-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;align-items:center;}
  .contact-mail{font-family:var(--font-en);font-size:14px;color:var(--muted);
    letter-spacing:.02em;}
  .contact-mail b{color:var(--ink);font-weight:500;}

  
  footer.ft{border-top:1px solid var(--line);padding:40px 0;}
  .ft-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;}
  .ft-inner .copy{font-family:var(--font-en);font-size:12.5px;color:var(--muted-2);letter-spacing:.02em;}
  .ft-links{display:flex;gap:24px;}
  .ft-links a{font-size:13px;color:var(--muted);transition:color .2s;}
  .ft-links a:hover{color:var(--accent);}

  
  .reveal{opacity:0;transform:translateY(28px);
    transition:opacity .85s cubic-bezier(.2,.7,.2,1), transform .85s cubic-bezier(.2,.7,.2,1);}
  .reveal.in{opacity:1;transform:none;}
  .reveal.d1{transition-delay:.08s;}
  .reveal.d2{transition-delay:.16s;}
  .reveal.d3{transition-delay:.24s;}

  
  @media (max-width:900px){
    .about-grid{grid-template-columns:1fr;gap:38px;}
    .principles{margin-top:30px;}
  }
  @media (max-width:760px){
    .wrap{padding:0 22px;}
    .nav-links{display:none;flex-direction:column;position:absolute;top:72px;left:0;right:0;
      padding:20px 22px;background:rgba(6,14,34,.96);backdrop-filter:blur(18px);
      border-bottom:1px solid var(--line);gap:20px;}
    .nav-links.open{display:flex;}
    .nav-burger{display:flex;}
    .nav-cta{display:none;}
    .svc-grid{grid-template-columns:1fr;gap:18px;}
    .svc-card{padding:34px 26px 30px;}
    .principles{grid-template-columns:1fr;gap:14px;}
    .hero h1 .en-sub{margin-top:14px;}
    .btn{flex:1 1 auto;justify-content:center;}
  }
  @media (max-width:420px){
    .hero-actions .btn{width:100%;}
  }

  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    .scroll-cue .track::after{animation:none;}
  }
</style>